Integration of gold nanoparticles in optical resonators |
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Authors: | Jiménez-Solano Alberto López-López Carmen Sánchez-Sobrado Olalla Luque José Miguel Calvo Mauricio E Fernández-López Cristina Sánchez-Iglesias Ana Liz-Marzán Luis M Míguez Hernán |
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Affiliation: | Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, C/América Vespucio 49, 41092 Sevilla, Spain. |
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Abstract: | The optical absorption of one-dimensional photonic crystal based resonators containing different types of gold nanoparticles is controllably modified by means of the interplay between planar optical cavity modes and localized surface plasmons. Spin-casting of metal oxide nanoparticle suspensions was used to build multilayered photonic structures that host (silica-coated) gold nanorods and spheres. Strong reinforcement and depletion of the absorptance was observed at designed wavelength ranges, thus proving that our method provides a reliable means to modify the optical absorption originated at plasmonic resonances of particles of arbitrary shape and within a wide range of sizes. These observations are discussed on the basis of calculations of the spatial and spectral dependence of the optical field intensity within the multilayers. |
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